钢铁
Home
|
About Journal
|
Editorial Board
|
Instruction for Authors
|
Subscriptions
|
Advertisement
|
Contacts Us
|
Chinese
Office Online
Author Center
Peer Review
Editor Work
Office Work
Editor-in-chief
Journal Online
Forthcoming Articles
Current Issue
Archive
Read Articles
Download Articles
Email Alert
Quick Search
Advanced Search
2010 Vol. 45 No. 6
Published: 2010-06-15
综合论述
1
YANG Gang Yong GAN
Research and Development of S30432 Steel Tubes in China Used for USC Power Plants
The authors of the paper reviewed and summarized the investigation in laboratories, pilot trials and industrial implementation of S30432 boiler steel tubes used for fossil fired ultra super critical (USC) power plants in China in the past decade, with the emphasis on the technical breakthrough of the determination of chemistry optimization and the best fit heat treatment during production. The advancement of industrial production of S30432 steel tubes and its expected application in China was also included in the present paper. The obtained results have shown that the steel and boiler makers of China have been able to successfully manufacture S30432 boiler steel tubes used to build USC power plants, the technology is mature, and the supplying capability has gradually achieved
2010 Vol. 45 (6): 1-1 [
Abstract
] (
2739
) [
HTML
0KB] [
PDF
0KB] (
85
)
原料与炼铁
7
Lu Qing Shuhui Zhang
Experimental Study on Removal Arsenic in iron ore with arsenic sintering process
The physicochemical properties of iron ore with arsenic in South of China was analyzed by chemical analysis, XRD, high power microscope, EDS, XPS and atomic absorption spectrometry method. The effects of various factors on arsenic removal in sintering process were studied and the optimal technique parameters were obtained. The results show that the mineral of iron ore with arsenic in South of China mainly composes of magnetite and gangue, in which arsenic with 0.282% mass content exists as FeAsS and few as As2S3. The oxidation and thermal decomposition reaction of FeAsS occurs in sintering process. Under low oxidizing atmosphere the arsenic removal rate of iron ore with arsenic in South of China increase when the reaction temperature increases, the reaction time extends, or the coke powder content rises. The optimal removal arsenic process parameter is: reaction temperature 1050~1100℃, reaction time 8~15min, and coke powder content 6%.
2010 Vol. 45 (6): 7-7 [
Abstract
] (
3365
) [
HTML
0KB] [
PDF
0KB] (
66
)
12
Yan-qi SONG Jing-she LI Ming-sheng YANG TANG Hai-yan
Experiment on Pelletizing Technology Using Indian Hematite in Xinxing Pipes Co.
In order to exploit iron ore resources, Xinxing Pipes Co. plans to build a two- million-ton pellet production line in India, using Indian hematite to pelletize. The experiment on the property performance of pelletizing with India hematite were carried out by simulating the grate-kiln pellet process in laboratory. The results show that the fine ore whose size less than 200 mesh should be over 65 in mass percent, after grinding, with the ratio of bentonite about 1%. Also, the process parameters of drying and preheating sections were determined by the orthogonal experiment in the micro-pellet roasting simulation system, which provide a reference for the design of the pellet production line in India.
2010 Vol. 45 (6): 12-12 [
Abstract
] (
3589
) [
HTML
0KB] [
PDF
0KB] (
89
)
16
Lu Xiao-yun
Online Quality Control Model of Sinter Process Based On Generalized Analysis
In order to develop the function on the process computer system of introduction sintering machine, solute the problem that the ash box mathematical model satisfies difficulty with the requirements of the new technology. It puts forward in this paper the method of construction of online quality control model in sintering process, making use of known in-out data of the model for process control system, adopting to the generalized analysis method, which combines cluster method with mechanism method. By means of continuous online testing and running on 450m2 sintering machine, have been proved the efficiency of this method and realized the online quality control of sintering process which adapt the requirement of technology.
2010 Vol. 45 (6): 16-16 [
Abstract
] (
2678
) [
HTML
0KB] [
PDF
0KB] (
74
)
20
Shu-Hua DAI
Granule Size Distribution And Its Prediction Model
In granulating experiments, the influence of moisture content, material size and distribution on granule size and distribution are investigated and analyzed as well. The results indicate: (1) with increasing the moisture content the granule size increases in the range of the suitable moisture, on the contrary the granule size decreases when the moisture content is too high. (2) the influence of the material size on the granule size plays a dominant role, and compared with which, the moisture content creates a minor effects on granule size; (3) the predicted value obtained from our mathematical model of the granule size and distribution is in satisfactory agreement with the experimental data, which has supplied the theoretical basis for applying the mathematical model to the practical sintering process. When the material size distribution is the Gauss distribution the granule size distribution is Gauss distribution too. But also the mass density function of the granule size distribution can be ascertained by the mass density function of the size distribution and the particle partition coefficient for the material.
2010 Vol. 45 (6): 20-20 [
Abstract
] (
2570
) [
HTML
0KB] [
PDF
0KB] (
68
)
炼钢
26
MENG Hua-dong liu liu
Mineralogical Morphology Study in the Converter Steelmaking Process
Mineralogical morphology of converter steelmaking slag has great significance to smelting operations, as well as to the utilization of steelmaking slag. In this paper, we give the process of mineralogical morphology of steelmaking slag a systematic study. The results show that the mineral composition and distribution of slag can be determined through mineralogical morphology inspection. Combined mineralogical morphology inspection、 composition and phase diagram of slag will display the characters of slag thoroughly. The free calcium oxide and the periclase formed in the converter smelting process are primary factor affect the steel slag long-term unstable.
2010 Vol. 45 (6): 26-26 [
Abstract
] (
3235
) [
HTML
0KB] [
PDF
0KB] (
69
)
31
Sen LUO
Solute Microsegregation Model for Continuous Casting Process of Steel
A mathematical model of solute microsegregation, which takes both the delta-ferrite/gamma-austenite phase transformation and MnS inclusion precipitation during the continuous casting process of steel into consideration, is developed. The effects of steel composition, MnS inclusion precipitation and cooling rate on high temperature mechanical properties of steel are all analyzed. The model results were extensively compared with experimental data of zero strength temperature (ZST) and zero ductility temperature (ZDT) that reported in the literature. In general, a good agreement between calculated and measured results was verified.
2010 Vol. 45 (6): 31-31 [
Abstract
] (
3091
) [
HTML
0KB] [
PDF
0KB] (
67
)
37
Dong-Gang LI
the Longevity Technology of AOD Furnace in Baosteel
The improvements on the AOD furnace longevity technology are introduced and analyzed in this article from the shape of the shell, components of the slag and the selection on the side-blow tuyeres. Based on some works by the above, the campaign of the AOD was promoted from 45 heats to current 185 heats in Baosteel.
2010 Vol. 45 (6): 37-37 [
Abstract
] (
2431
) [
HTML
0KB] [
PDF
0KB] (
88
)
41
The Technologic Research of ULS Steel in Masteel
In this paper the technologic research of the ultra low sulfur steel based on the production of X70/X80 pipe-line steel was discussed. The control of [S] content during BOF blowing and LF refining were analysed, the sulfur pickup during BOF blowing was mainly caused by molten iron slag after pretreatment and scrap, the LF deep desulfuriztion depends on the control of the top slag and the strong stirring power. By technologic adjustment, the [S] at the end of LF was stability controled below 0.0050%, and the average [S] was 0.0011%.
2010 Vol. 45 (6): 41-41 [
Abstract
] (
2490
) [
HTML
0KB] [
PDF
0KB] (
38
)
压力加工
44
A new way which based on least-squares of regressing deformation resistance model of St14 steel
The main process parameters of tandem cold rolling are rolling force and forward slip, and the rolling force and the forward slip settings depends on the accuracy of the calculation of rolling deformation resistance and friction coefficient. The degree of deformation is an important factor of affecting the deformation resistance. The selected regression model of Deformation resistance after logarithmic transformation in to a linear function, Take the St14 steel produced by Anshan Iron and Steel as an example, use the actual data through least squares successive fitting of the coefficient of deformation resistance regression model, In the same rolled conditions, the friction coefficient obtained using three different methods, so that model can be identical well with the actual production data. Show that use of the three different deformation resistance regression model, respectively, into the iterative calculation formula of rolling force, The results show that obtained rolling force in line with the measured rolling force basically. Among them, The calculated rolling force of deformation resistance regression model which from Stone formula can make the average error small, Therefore, we can elect the best model of deformation resistance to be used in the actual production pre-set of rolling force and forward slip.
2010 Vol. 45 (6): 44-44 [
Abstract
] (
2729
) [
HTML
0KB] [
PDF
0KB] (
68
)
49
Application of Large Deformation in High Temperature and Ultra Fast Cooling Process on Production of Pipeline Steel
The microstructural differences and mechanical properties of the tested steel rolled by ultra fast cooling process and traditional TMCP process were investigated by means of thermal simulation and laboratory hot rolling tests. It was demonstrated that condensate depression and nucleation rate increase with increasing cooling velocity and intracrystalline nucleation is main nucleation form of the new phase. Mechanical properties of the rolled plates in laboratory can exceed X90 grade because of the refining acicular ferrite, the dislocation with high density and the refining precipitation. Otherwise, the value of rolling force of high temperature process is lower than that of traditional TMCP process. Relaxation process makes mechanical properties of the tested plates worse because of grain growth coursing.
2010 Vol. 45 (6): 49-49 [
Abstract
] (
2878
) [
HTML
0KB] [
PDF
0KB] (
54
)
54
Effect of “dummy-off” on microstructure evolution and mean flow stress(MFS) of Nb,V bearing steel by numerical modeling in CSP production
After microstructure evolution model was validated by measured rolling data, effect of F2 or F3 “dummy-off “on microstructure evolution and mean flow stress(MFS) of Nb，V bearing steel produced by CSP was simulated in this paper. Simulating results show that the mixed-grain could be avoided by using F2 “dummy-off” in comparison with conventional rolling schedule while the same pass rolling temperature was maintained. Mixed grain may be produced when F3 “dummy-off “ was used, and MFS varied much more than that when F2 “dummy-off “ was used.
2010 Vol. 45 (6): 54-54 [
Abstract
] (
2935
) [
HTML
0KB] [
PDF
0KB] (
55
)
59
Li Ya-xin
Analysis of Quenching Residual Stress of P110 Oil Casing by Incremental Hole Drilling Method
In order to reduce the thermal stress and structural stress of P110 oil casing in the process of quench cooling, water quenching+air cooling+water quenching was proposed. The residual stresses of direct quenching and water quenching+air cooling+water quenching were determined by incremental hole drilling method and the residual stresses of two processes on crack formation and propagation was analysed. The results show that under the direct quenching the tangential and axial residual tensile stress are 229~281MPa and 191~237MPa. Under the water quenching+air cooling+water quenching process, the tangential residual stress is compressive stress at -422~-185MPa and the axial residual tensile stress is 90~190MPa. Compared to the direct quenching process, the tangential and axial stresses of proposed cooling methods are both decreased, then the microcrack formation and propagation is relieved.
2010 Vol. 45 (6): 59-59 [
Abstract
] (
2678
) [
HTML
0KB] [
PDF
0KB] (
63
)
钢铁材料
63
Zheng-Dong LIU YANG Gang
Investigation of hot compression on 403Nb blade steel
In order to provide dates for realizing the structure and property prediction system of 403Nb blade steel hot tandem rolling, the hot compression was carried out using the Gleeble-3500. According to the experimental dates, the parameter Z and flow stress equation were worked out respectively: ，σP＝14.5926ln ＋1002406.111•T－1－604.613658. The analysis of the structure shows that the 403Nb dynamic recrystallization forms the nuclear under the bulging mechanism. There are a few thin twins with width 30~100nm. The NbC particles in the matrix can stick the dislocations, which improves the hot deformation activation energy.
2010 Vol. 45 (6): 63-63 [
Abstract
] (
2552
) [
HTML
0KB] [
PDF
0KB] (
65
)
67
gong ya-lin
Research on hot ductility of Medium carbon microalloyed steel
High temperature mechanical behaviors of Nb and Nb、Ti containing steel were tested by Gleeble1500 thermal simulation testing machine. Meanwhile, influences of precipitate, phase change, cooling rate and dynamic recrystallization on hot ductility of the micro-alloy steel were also analyzed utilizing Gleeble. The results demonstrate that: the embrittlement region Ⅱ does not exist in Nb nor Nb、Ti containing steel. The temperature range of ductility region Ⅲ is about 950～700℃ in Nb containing steel and 900～725℃ in Nb、Ti containing steel respectively. Precipitation along the grain boundaries and during γ→α phase transformation are main factors which lead to a decrease on hot ductility of Nb and Nb、Ti containing steel. In the practice process the incidence of surface micro-cracks in micro-alloying steel can be reduced dramatically by decreasing specific water rate in secondary cooling zone.
2010 Vol. 45 (6): 67-67 [
Abstract
] (
2559
) [
HTML
0KB] [
PDF
0KB] (
87
)
74
WEN Hong-Ying
Effect of Carbon Content on Microstructure and Mechanical Properties of New Fe-Ni-Mn-Si-C TWIP Steel
Microstructures and tensile properties of new high carbon Fe-Ni-Mn-Si-C steels were investigated by optical microscope, X-ray diffraction and TEM. The results show that twinning induced plasticity effect is the main plasticity mechanism of the Fe-Ni-Mn-Si-C steels. With the increasing of carbon content, yield strength increases from 391 MPa to 458 MPa, tensile strength increases from 860 MPa to 974 MPa, and elongation increases from 63.6% to 69.2%. The serrated flow on the stress-strain curve becomes more obvious with the increasing of the carbon content. Fe-15Ni-12Mn-2.5Si-XC steels have high strain hardening capacity, and the maximal strain hardening exponent of the steels can reach up to 0.73 when the carbon content increases to 0.98%.
2010 Vol. 45 (6): 74-74 [
Abstract
] (
3057
) [
HTML
0KB] [
PDF
0KB] (
57
)
79
CHI Hong-xiao MA Dang-shen
Effect of Aluminum on Microstructure and Mechanical Properties of Cr8WMo2V2SiNb Steel
Effect of aluminum on microstructure and mechanical properties of Cr8WMo2V2SiNb steel were investigated. The results show that aluminum can refine as-cast microstructure, carbides and grain size. Aluminum also can increase critical point while improving the appearance of ferrite in quenched structure. In addition, aluminum can improve the transformation of retained austenite to martensite and increases the tempered hardness. Moreover, aluminum improves the bending strength and wear resistance in the case of losing little toughness.
2010 Vol. 45 (6): 79-79 [
Abstract
] (
2866
) [
HTML
0KB] [
PDF
0KB] (
52
)
84
Study of Precipitation Evolution in 2205 DSS during Aging Treatment and its Effect on Impact Toughness
A serial ageing treatments of 2205 duplex stainless steel(DSS) at the temperature of 700℃ and 750℃ for different time intervals （0.5h，1h，2h) were carried out. Aided by optical metallography, SEM&EDS and TEM analysis, the evolution of precipitation in 2205DSS during aging treatment was determined. The results showed that the main type of precipitation in 2205DSS was Cr2N, χ phase at 700℃ aging and Cr2N, χ and σ phase at 750℃ aging. Combined with impact toughness experimental results, it was shown that the impact energy of 2205 DSS decreased with prolonged keeping time; in addition, the impact energy of 2205 DSS at 750 aging was lower than that at 700℃ aging due to the σ phase precipitated in microstructure of 2205 DSS.
2010 Vol. 45 (6): 84-84 [
Abstract
] (
2381
) [
HTML
0KB] [
PDF
0KB] (
60
)
88
CHEN Bing-Zhang
Optimization of Controlled Rolling and Cooling Process on Low-alloy High-strength Quenched and Tempered Steel
Low-alloy high-strength quenched and tempered steel rolling method and the cooling rate after rolling has been studied. The results showed that: test steel using different rolling methods and cooling rate to obtain different initial microstructure and mechanical properties before quenching, but they have the same microstructure and mechanical properties after quenching and tempering. Low-alloy high strength quenched and tempered steel suggested using one-stage rolling method, cooling rate should not be too low. Quenched and tempered steel after the tests have a high uniformity, as compared with the TMCP has superior strength and plasticity and strength and toughness.
2010 Vol. 45 (6): 88-88 [
Abstract
] (
3060
) [
HTML
0KB] [
PDF
0KB] (
86
)
环保与能源
94
Jeery Guo
Experiment study of Ore/coal Composite Pellet Compacted by BF Flue Dust
Abstract: Direct reduced experiments were carried out by using ore/coal composite pellets which were compacted by BF flue dust and mill scale. The effects of different reduced atmospheres, different C/O in pellets, reduced time and temperature to the reduction results were researched. The results shown high metallization degree was gained by reduced the ore/coal composite pellets under high temperature in the air. Metallization degree increased steadily with reduced time when the C/O in pellet is more than 1.2. And it reached 96.94% after reduced 30 minutes under 1350℃. The trend of metallization degree change suggested the reaction in pellet was first controlled by chemical reaction, and then it gradually changed to diffusion control. Iron reduced from pellet separated from slag when ore/coal composite pellet reacted for 30minutes under 1400℃ in the air.
2010 Vol. 45 (6): 94-94 [
Abstract
] (
2730
) [
HTML
0KB] [
PDF
0KB] (
68
)
98
The Research on Mineral Phase Affecting Stability of Converter Slag in Ansteel
The microstructure of converter slag samples from Ansteel are observed by the scanning electron microscope with X-ray energy dispersive spectrometer, and the element composition of micro-regions in the mineral phase are determined. The results show that the main phases in the slag are C2S, Fe2O3 –Al2O3–CaO and MgO–FeO solid solution, and the minor minerals are C3S, free-CaO and free-MgO. The main organization of RO phase are found for the MgO–FeO solid solution in Anteel converter slag, which contents are approximately 10%~20%, and the representative proportion of MgO/FeO approximately is 1:2; The f-CaO content of Ansteel converter slag is approximately 2.08%~7.79%, and the f-MgO content is approximately 0.16%~0.41%; The microscopic images and the chemical analysis results proved that the major effect factor of steel slag stability is the content of f-CaO; while free-magnesia single-phase organization are very few, which impact of the stability of converter slag mainly depends on the RO phase.
2010 Vol. 45 (6): 98-98 [
Abstract
] (
2321
) [
HTML
0KB] [
PDF
0KB] (
42
)
钢铁
News
·
·
·
·
·
More
Author Center
Instruction for Authors
Template
Copyright Agreement
Links
·
Links
More
Copyright © IRON AND STEEL
Supported by: Beijing Magtech
